CN112403296A - Gas distribution method and system for simulating surface atmospheric environment of golden star - Google Patents
Gas distribution method and system for simulating surface atmospheric environment of golden star Download PDFInfo
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Abstract
The application provides a gas distribution method and a gas distribution system for simulating a golden star surface atmospheric environment, wherein the method comprises the following steps: s1, determining the gas composition and content of the simulated atmospheric environment; s2, setting SO2、CO、COS、H2S, HCL and HF and CO, respectively2The mixed gas distribution concentration; s3, respectively diluting SO2、CO、COS、H2S, HCL and HF with CO2Distributing gas to obtain six mixed gases; s4, calculating six mixed gases and CO2、N2And H2An intake air amount of O (gas); s5, sequentially introducing the six mixed gases obtained in the step S3 into an atmospheric environment simulation container; s6, adding N2And H2Introducing O (gas state) into the atmospheric environment simulation container; s7, mixing CO2Introducing into an atmospheric environment simulation container; and S8, ending air distribution. The method and the device can accurately finish the gas components of the atmospheric environment on the surface of the VenusA simulation was performed.
Description
Technical Field
The application relates to the technical field of extraterrestrial celestial sphere gas environment simulation, in particular to a gas distribution method and a gas distribution system for simulating a golden star surface atmospheric environment.
Background
Venus is the planet in the solar system that is closest to the earth and is similar to the earth in volume and mass. The surface pressure of the golden star is about 90 times of that of the earth, the main component of the golden star is carbon dioxide, and the surface of the golden star has extremely high temperature which can reach 760K at most. Venus atmospheric constituents consist primarily of carbon dioxide and nitrogen, with the remainder consisting primarily of argon and carbon monoxide, small amounts of water vapor (compared to Earth), large amounts of sulfur dioxide (compared to Earth), and small amounts of HCL and HF also observed. Table 1 briefly compares the gas composition and content of the atmosphere at the surface of the star with the atmosphere at the surface of the earth.
TABLE 1 Venus and Earth's surface gas composition
| Serial number | Gas species | Jin Xing | The |
| 1 | CO2 | 96％ | 0.03％ |
| 2 | N2 | 3.5％ | 77.0％ |
| 3 | Ar | 0.007％ | 0.93％ |
| 4 | Ne | 0.0005％(5ppm) | 0.0018％(18ppm) |
| 5 | H2O | 30ppm | ～1％ |
| 6 | HDO | 3ppm | ～1ppm |
| 7 | SO2 | 150ppm | 0.2ppb |
| 8 | COS | 4ppm | 0.5ppb |
| 9 | CO | 0.004％(40ppm) | 0.000012％(120ppb) |
| 10 | HCL | 0.5ppm | Micro-scale |
| 11 | HF | 0.005ppm | Micro-scale |
| 12 | Atomic oxygen O | Micro-scale | Micro-scale |
| 13 | OH-OH | Micro-scale | Micro-scale |
| 14 | Atomic hydrogen H | Micro-scale | Micro-scale |
At present, a golden star surface detection task in China is still in a starting stage, research and development of detection equipment cannot be carried out on the golden star surface detection task, a large number of simulation tests are required in the research and development stage of the detection equipment, the simulation tests cannot be carried out on the atmospheric environment on the golden star surface, the atmospheric environment on the golden star surface has the characteristics of high pressure, multiple gas components and large difference, partial trace gas exists in the gas components, the content of the trace gas is small, the existing industrial sensor cannot measure, and the error of the atmospheric environment on the golden star surface simulated by the existing gas distribution method is large.
Disclosure of Invention
The application aims to solve the problems and provide a gas distribution method and a gas distribution system for simulating a golden star surface atmospheric environment.
In a first aspect, the present application provides a gas distribution method for simulating a golden star surface atmospheric environment, the method including the steps of:
s1, determining the gas composition and content of the simulated atmospheric environment according to the atmospheric components on the surfaces of the golden stars, wherein the gas composition comprises CO2、N2、H2O (gaseous), SO2、CO、COS、H2S, HCL and HF;
s2, setting SO according to the content of each gas in the step S12、CO、COS、H2S, HCL and HF and CO, respectively2The mixed gas distribution concentration;
s3, according to the gas distribution concentration of each gas in the step S2, SO is respectively diluted by adopting a dilution method2、CO、COS、H2S, HCL and HF with CO2Distributing gas to obtain six mixed gases;
s4, calculating six mixed gases and CO according to the content of each gas in the step S1, the distribution concentration of each gas in the step S2 and the volume of the atmospheric environment simulation container2、N2And H2An intake air amount of O (gas);
s5, sequentially introducing the six mixed gases obtained in the step S3 into an atmospheric environment simulation container according to the air inflow amount calculated in the step S4;
s6, according to the air inlet quantity calculated in the step S4, N is added2And H2Introducing O (gas state) into the atmospheric environment simulation container;
s7, mixing CO according to the air intake quantity calculated in the step S42Introducing into an atmospheric environment simulation container;
and S8, ending air distribution.
Further, after step S7 is completed, the gas in the atmospheric environment simulation container is sampled and analyzed to determine whether the content of each component gas meets the requirement, and if not, the gas that does not meet the requirement is independently controlled to supplement gas.
Further, before proceeding to step S5, the atmosphere environment simulation container is evacuated to evacuate the atmosphere environment simulation container.
Further, according to the intake air amount calculated in step S4, N is added2And H2O (gaseous state) is introduced into the atmospheric environment simulation container, and the method specifically comprises the following steps: will N2The partial flow is divided, and part of the partial flow passes through a humidifier to form H2And introducing the O (gas state) into the atmospheric environment simulation container, and directly introducing the other part into the atmospheric environment simulation container.
Further, according to the intake air amount calculated in step S4, CO is added2Let in atmospheric environment simulation container specifically includes: introducing CO2And (3) splitting, wherein one part of the split flow is introduced into the atmospheric environment simulation container through a ventilation pipeline of the six mixed gases, and the other part of the split flow is directly introduced into the atmospheric environment simulation container.
In a second aspect, the present application provides a gas distribution system for simulating a golden star surface atmospheric environment, comprising an atmospheric environment simulation container and a CO connected to a gas inlet end of the atmospheric environment simulation container2Gas distribution branch, N2Gas distribution branch, H2An O gas distribution branch and six mixed gas distribution branches; the six mixed gas distribution branches are respectively SO2With CO2Mixed gas distribution branch, CO and CO2Mixed gas distribution branch, COS and CO2Mixed gas distribution branch, H2S and CO2Mixed gas distribution branch, HCL and CO2Mixed gas distribution branch and HF and CO2The mixed gas distribution branch.
Further, a vacuum system is connected to the atmospheric environment simulation container; the vacuum system is configured to evacuate the atmospheric environment simulation container prior to venting.
Furthermore, the atmospheric environment simulation container is also connected with a gas analyzer for analyzing the gas in the atmospheric environment simulation container.
Furthermore, the atmospheric environment simulation container is provided with a temperature sensor and a pressure sensor which are respectively used for detecting the temperature and the pressure in the atmospheric environment simulation container.
Compared with the prior art, the beneficial effect of this application: the gas distribution method for simulating the surface atmospheric environment of the golden star can accurately simulate the gas components of the surface atmospheric environment of the golden star, and the gas components of the simulated atmospheric environment are determined to be CO according to the real atmospheric components on the surface of the golden star2、N2、H2O (gaseous), SO2、CO、COS、H2S, HCL and HF, not only can ensure the authenticity of the simulation, but also can reduce the simulation difficulty; the control of ppb level trace gas can be realized by a dilution method, thereby effectively improving the gas distribution precision.
Drawings
Fig. 1 is a flowchart of a gas distribution method for simulating a golden star surface atmospheric environment provided in embodiment 1 of the present application;
fig. 2 is a schematic structural diagram of a gas distribution system for simulating a golden star surface atmospheric environment provided in embodiment 2 of the present application;
fig. 3 is a schematic structural diagram of the gas distribution module in fig. 2.
The text labels in the figures are represented as:
1. an atmospheric environment simulation container; 2. a vacuum system; 3. a gas analyzer; 4. a temperature sensor; 5. a pressure sensor; 6. a humidifier; 7. and a gas distribution module.
Detailed Description
The following detailed description of the present application is given for the purpose of enabling those skilled in the art to better understand the technical solutions of the present application, and the description in this section is only exemplary and explanatory, and should not be taken as limiting the scope of the present application in any way.
Example 1
The embodiment provides a gas distribution method for simulating a golden star surface atmospheric environment, a flow chart of the method is shown in fig. 1, and the method comprises the following steps:
s1, determining the gas composition and content of the simulated atmospheric environment according to the atmospheric components on the surfaces of the golden stars, wherein the gas composition comprises CO2、N2、H2O (gaseous), SO2、CO、COS、H2S, HCL and HF, not only can ensure the authenticity of the simulation, but also can reduce the simulation difficulty.
According to the atmospheric composition of the surface of the star shown in Table 1, neon (Ne) and argon (Ar) are inert gases, heavy water (HDO) and water (H)2O) are similar in chemical properties, and therefore the simulation of the atmospheric environment on the surface of the Venus was performed according to table 2, which shows the gas composition and content of the simulated atmospheric environment in table 2.
TABLE 2
| Serial number | Composition (I) | Content of |
| 1 | CO2 | 0.965 |
| 2 | N2 | 0.035 |
| 3 | H2O (gas state) | 3.00E-5 |
| 4 | SO2 | 18.0E-5 |
| 5 | CO | 1.20 |
| 6 | COS | 5.10E-5 |
| 7 | H2S | 0.20E-5 |
| 8 | HCL | 5.00E-7 |
| 9 | HF | 2.50E-9 |
In Table 2, CO in the mixed gas simulating the atmospheric environment2The content of (A) is 96.5% by weight of CO2The physical property parameter of the mixed gas is substituted for the physical property parameter of the mixed gas, and the thermodynamic state of the mixed gas is calculated. CO 22The high-precision thermodynamic model of (2) is SW 96. This model is also a reference model recommended by the National Institute of Standards and Technology (NIST). According to the model, CO2The density of the product in the state of the surface temperature and pressure environment of the golden star (the surface temperature of the golden star is 743.15K, and the surface pressure of the golden star is 9.2MPa) is 65.117kg/m3(1479.6mol/m3)。
S2, setting SO according to the content of each gas in the step S12、CO、COS、H2S, HCL and HF and CO, respectively2Mixed gas distribution concentration.
SO was set according to the content of each gas in Table 22CO, COS separately from CO2The mixed gas distribution concentration is 1%, H2S, HCL, HF and CO respectively2The combined gas distribution concentration was 100ppm, as shown in Table 3. According to this method, the minimum metering is requiredThe volume (HF) is 780ml, so that trace gas control can be realized, and the gas metering precision can be effectively improved.
TABLE 3
S3, according to the gas distribution concentration of each gas in the step S2, SO is respectively diluted by adopting a dilution method2、CO、COS、H2S, HCL and HF with CO2And distributing gas to obtain six mixed gases.
The gas mixing step by dilution method is that a gas cylinder manufacturer mixes trace gas and CO2And distributing gas, wherein the six kinds of mixed gas are distributed in respective gas cylinders. The dilution method can effectively improve the gas distribution precision.
S4, calculating six mixed gases and CO according to the content of each gas in the step S1, the distribution concentration of each gas in the step S2 and the volume of the atmospheric environment simulation container2、N2And H2The amount of intake air of O (gas).
The volume of the atmospheric environment simulation container is assumed to be 1m3The volume of each gas component under the standard condition can be calculated according to the content of each gas in the step S1, and then six mixed gases and CO are calculated according to the gas distribution concentration set in the step S22、N2And H2The amount of O (gas) taken in is shown in Table 3.
Before the atmosphere environment simulation container is ventilated, the atmosphere environment simulation container and each gas distribution pipeline are vacuumized by using a vacuum system so as to pre-pump the gas in the atmosphere environment simulation container, and the purpose of gas washing is achieved.
And S5, sequentially introducing the six mixed gases obtained in the step S3 into the atmospheric environment simulation container according to the air inflow amount calculated in the step S4.
SO2、CO2The total air intake amount of the mixed gas is about 562NL, the selection type of the mass flow controller is 0-50 NL/min, and therefore the fastest air distribution time is about: 562/50 ≈ 12 min.
CO、CO2The total air intake amount of the mixed gas is about 37.5NL, and the selection type of the mass flow controller is 0-5 NL/min, so the fastest air distribution time is about: 37.5/5 ≈ 8 min.
COS、CO2The total air intake amount of the mixed gas is about 159NL, the selection type of the mass flow controller is 0-20 NL/min, so the fastest air distribution time is about: 159/20 ≈ 8 min.
H2S、CO2The total air intake amount of the mixed gas is about 625NL, and the selection type of the mass flow controller is 0-50 NL/min, so that the fastest air distribution time is about: 625/50 ≈ 13 min.
HCL、CO2The total air intake amount of the mixed gas is about 156NL, and the selection type of the mass flow controller is 0-20 NL/min, so that the fastest air distribution time is about: 156/20 ≈ 8 min.
HF、CO2The total intake amount of the mixed gas is about 780mL, and the selection of the mass flow controller is 0-100 mL/min, so the fastest gas distribution time is about: 780/100 ≈ 8 min.
S6, according to the air inlet quantity calculated in the step S4, N is added2And H2And introducing O (gas) into the atmospheric environment simulation container. Introducing water vapor by adopting a dry nitrogen humidifying method, which specifically comprises the following steps: will N2Partial flow of N2Is formed into H by a humidifier2And introducing the O (gas state) into the atmospheric environment simulation container, and directly introducing the other part into the atmospheric environment simulation container under the control of a mass flow meter.
N2The total air intake amount is about 1093NL, the selection type of the mass flow controller is 0-100 NL/min, and therefore the fastest air distribution time is about 1093/100 ≈ 11 min.
S7, mixing CO according to the air intake quantity calculated in the step S42And (4) introducing into an atmospheric environment simulation container. The method specifically comprises the following steps: introducing CO2Split stream, small amount of CO2And the other part is directly introduced into the atmospheric environment simulation container under the control of a mass flowmeter. By CO2The residual gas in the pipeline is flushed, so that the error caused by the residual gas in the pipeline can be reduced, and the gas distribution precision is improved.
CO2The total air intake amount is 27415NL, the selection type of the mass flow controller is 0-250 NL/min, and therefore the fastest air distribution time is about 27415/250 ≈ 110 min.
And then, sampling and analyzing the gas in the atmospheric environment simulation container, judging whether the content of each component gas meets the requirement, and if not, independently controlling the gas which does not meet the requirement to supplement gas.
And S8, ending air distribution.
Example 2
The embodiment provides a gas distribution system for simulating a golden star surface atmospheric environment, which is used for completing the gas distribution method for simulating the golden star surface atmospheric environment provided in the embodiment 1. The structure of the air distribution system is shown in fig. 2. The gas distribution system comprises an atmospheric environment simulation container 1 and CO connected to the gas inlet end of the atmospheric environment simulation container 12Gas distribution branch, N2Gas distribution branch, H2An O gas distribution branch and six mixed gas distribution branches; the six mixed gas distribution branches are respectively SO2With CO2Mixed gas distribution branch, CO and CO2Mixed gas distribution branch, COS and CO2Mixed gas distribution branch, H2S and CO2Mixed gas distribution branch, HCL and CO2Mixed gas distribution branch and HF and CO2The mixed gas distribution branch.
Each mixed gas distribution branch comprises a respective gas cylinder and a gas distribution module 7. The gas distribution module has a structural composition, referring to fig. 3, the gas distribution module 7 at least comprises a filter, an electromagnetic valve 1, a pressure reducing valve, a mass flow controller and an electromagnetic valve 2 which are sequentially connected in series; one end of the electromagnetic valve 3 is connected to the output end of the pressure reducing valve, and the other end of the electromagnetic valve 3 is connected to the output end of the electromagnetic valve 2. The mixed gas inlet mode of each mixed gas distribution branch comprises the following steps: the filter filters the mixed gas, and the pressure reducing valve reduces the pressure of the high-pressure gas source gas to the proper pressure of the mass flow controller. And opening the electromagnetic valve 1 and the electromagnetic valve 3, closing the electromagnetic valve 2, opening the electromagnetic valve 2 again after the gas flow is stable, closing the electromagnetic valve 3, and enabling the gas to enter the atmospheric environment simulation container 1. When the amount of the air introduced into the atmospheric environment simulation container 1 reaches a set value, each solenoid valve is automatically turned off.
CO2The gas distribution branch comprises CO2Gas cylinder, gas distribution module 7, CO2CO in gas cylinder2The gas is divided into seven branches after passing through the national gas distribution module 7, wherein one branch is introduced into the atmospheric environment simulation container 1, and the other six branches are respectively introduced into six mixed gas distribution branches for flushing residual gas in the pipeline of the mixed gas distribution branches, so that the error caused by the residual gas in the pipeline can be reduced, and the gas distribution precision is improved.
N2The gas distribution branch comprises a nitrogen cylinder and N in the nitrogen cylinder2Is divided into two branches, wherein one branch is introduced into the atmospheric environment simulation container 1, and the other branch passes through the humidifier 6 to form H2And an air distribution branch, wherein dry nitrogen is humidified by a humidifier 6 to form water vapor and then the water vapor is introduced into the atmospheric environment simulation container 1.
Further, a vacuum system 2 is connected to the atmospheric environment simulation container 1; the vacuum system 2 is configured to evacuate the atmospheric environment simulation container 1 before ventilation, and evacuate gas in the atmospheric environment simulation container in advance to achieve the purpose of gas washing.
Further, the atmospheric environment simulation container 1 is further connected with a gas analyzer 3 for analyzing the gas in the atmospheric environment simulation container 1.
Further, the atmospheric environment simulation container 1 is provided with a temperature sensor 4 and a pressure sensor 5, which are respectively used for detecting the temperature and the pressure in the atmospheric environment simulation container 1.
The gas distribution method for simulating the surface atmospheric environment of the golden star comprises a mixed gas state calculation method, a trace gas flow control method and a trace water vapor input method. Specifically, the gas composition of the simulated atmospheric environment is determined to be CO according to the real atmospheric composition on the surfaces of the golden stars2、N2、H2O (gaseous), SO2、CO、COS、H2S, HCL and HF, not only can ensure the authenticity of the simulation, but also can reduce the simulation difficulty; the control of ppb level trace gas can be realized by a dilution method, thereby effectively improving the gas distribution precision; by using CO2Residual gas in the six mixing pipelines is flushed, so that errors caused by the residual gas in the pipelines can be reduced, and the gas distribution precision is improved; and introducing water vapor by adopting a dry nitrogen humidifying method, and finally performing feedback regulation according to the measurement result of the gas analyzer, thereby completing the simulation of the surface atmospheric environment of the golden star.
The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that there are no specific structures which are objectively limitless due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the technical features mentioned above can be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention in other instances, which may or may not be practiced, are intended to be within the scope of the present application.
Claims (9)
1. A gas distribution method for simulating the surface atmospheric environment of a golden star is characterized by comprising the following steps:
s1, determining the gas composition and content of the simulated atmospheric environment according to the atmospheric components on the surfaces of the golden stars, wherein the gas composition comprises CO2、N2、H2O (gaseous), SO2、CO、COS、H2S, HCL and HF;
s2, setting SO according to the content of each gas in the step S12、CO、COS、H2S, HCL and HF and CO, respectively2The mixed gas distribution concentration;
s3, according to the gas distribution concentration of each gas in the step S2, SO is respectively diluted by adopting a dilution method2、CO、COS、H2S, HCL and HF with CO2Distributing gas to obtain six mixed gases;
s4, calculating six according to the content of each gas in the step S1, the distribution concentration of each gas in the step S2 and the volume of the atmospheric environment simulation containerMixed gas, CO2、N2And H2An intake air amount of O (gas);
s5, sequentially introducing the six mixed gases obtained in the step S3 into an atmospheric environment simulation container according to the air inflow amount calculated in the step S4;
s6, according to the air inlet quantity calculated in the step S4, N is added2And H2Introducing O (gas state) into the atmospheric environment simulation container;
s7, mixing CO according to the air intake quantity calculated in the step S42Introducing into an atmospheric environment simulation container;
and S8, ending air distribution.
2. A gas distribution method for simulating the atmospheric environment on the surface of a golden star according to claim 1, wherein after step S7 is completed, the gas in the atmospheric environment simulation container is sampled and analyzed to determine whether the gas content of each component meets the requirements, and if not, the gas which does not meet the requirements is independently controlled to be supplied with gas.
3. A method for distributing gas on a simulated golden star surface according to claim 1, wherein before the step S5, the atmosphere environment simulation container is vacuumized to evacuate gas in the atmosphere environment simulation container.
4. A gas distribution method for simulating the atmospheric environment on the surface of a golden star according to claim 1, wherein N is calculated according to the intake air amount calculated in step S42And H2O (gaseous state) is introduced into the atmospheric environment simulation container, and the method specifically comprises the following steps: will N2The partial flow is divided, and part of the partial flow passes through a humidifier to form H2And introducing the O (gas state) into the atmospheric environment simulation container, and directly introducing the other part into the atmospheric environment simulation container.
5. A gas distribution method for simulating the atmospheric environment on the surface of a golden star according to claim 1, wherein the CO is mixed according to the intake air amount calculated in step S42Let in atmospheric environment simulation container specifically includes: will be provided withCO2And (3) splitting, wherein one part of the split flow is introduced into the atmospheric environment simulation container through a ventilation pipeline of the six mixed gases, and the other part of the split flow is directly introduced into the atmospheric environment simulation container.
6. A gas distribution system for simulating the surface atmospheric environment of a golden star comprises an atmospheric environment simulation container (1) and CO connected to the gas inlet end of the atmospheric environment simulation container (1)2Gas distribution branch, N2Gas distribution branch, H2An O gas distribution branch and six mixed gas distribution branches; the six mixed gas distribution branches are respectively SO2With CO2Mixed gas distribution branch, CO and CO2Mixed gas distribution branch, COS and CO2Mixed gas distribution branch, H2S and CO2Mixed gas distribution branch, HCL and CO2Mixed gas distribution branch and HF and CO2The mixed gas distribution branch.
7. The air distribution system for simulating the golden star surface atmospheric environment according to claim 6, wherein a vacuum system (2) is connected to the atmospheric environment simulation container (1); the vacuum system (2) is configured for evacuating the atmosphere simulating container (1) prior to venting.
8. The gas distribution system for simulating the golden star surface atmospheric environment according to claim 6, wherein a gas analyzer (3) is further connected to the atmospheric environment simulation container (1) and is used for analyzing the gas in the atmospheric environment simulation container (1).
9. The gas distribution system for simulating the golden star surface atmospheric environment according to claim 6, wherein the atmospheric environment simulation container (1) is provided with a temperature sensor (4) and a pressure sensor (5) for detecting the temperature and the pressure in the atmospheric environment simulation container (1), respectively.
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| CN114660239A (en) * | 2022-03-09 | 2022-06-24 | 北京卫星环境工程研究所 | System and method for simulating surface environment of golden star |
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| CN112403296B (en) | 2022-07-26 |
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